Stk413-430 Circuit Diagram _verified_ (2024-2026)

: General guides for similar Sanyo STK modules (like the STK412-430) often share the same design philosophy, focusing on dual power supply (+/- voltage) and heat sink requirements to prevent failure. Essential Tips for Your Build/Repair

Each channel features a dedicated differential input pin pair. Sound sources (such as DACs or pre-amplifiers) connect through a coupling and low-pass filter topology: A

The is a thick-film hybrid IC designed specifically for high-fidelity audio power amplification. Known for its reliability and relatively straightforward application, this IC is a favorite among DIY audio enthusiasts for building powerful stereo amplifiers. stk413-430 circuit diagram

| | Symbol | Function | Pin № | Symbol | Function | | :--------- | :----------- | :------------------------------- | :--------- | :----------- | :----------------------------------- | | 1 | +IN1 (L) | Positive Input for Left Channel | 9 | IN2 (R) | Negative Input for Right Channel | | 2 | NF1 (L) | Negative Feedback for Left Channel | 10 | GND | Ground | | 3 | GND | Ground | 11 | NF2 (R) | Negative Feedback for Right Channel | | 4 | V+ | Positive Power Supply (Vcc) | 12 | OUT2 (R) | Output for Right Channel | | 5 | OUT1 (L) | Output for Left Channel | 13 | V- | Negative Power Supply (Vee) | | 6 | V- | Negative Power Supply (Vee) | 14 | BS2 (R) | Bootstrap for Right Channel | | 7 | BS1 (L) | Bootstrap for Left Channel | 15 | +IN2 (R) | Positive Input for Right Channel | | 8 | MUTE | Mute Control | 16 | NC | No Connection (Usually left unconnected) |

Features large, complementary power Bipolar Junction Transistors (BJTs) arranged in a push-pull configuration to deliver high current to the speakers. Pin Configuration and Description : General guides for similar Sanyo STK modules

: To prevent hums, buzzes, and ground loops, implement a "Star Ground" topology. Connect the signal ground, power supply center tap, Zobel network ground, and speaker return paths to a single, heavy copper point on your PCB.

Here's a sample circuit diagram:

A typical application circuit for the STK413-430 includes several essential blocks to ensure stable operation:

Vee --> C_POWER2(“Power Supply

: Utilizes coupling capacitors to block DC while allowing the AC audio signal to pass to the amplifier pins.